sometimes the purple stems are from the strain of the plant
josh180 Reviewed by josh180 on . Why do I always see Red? All the plants I have grown always get red veins on leafs and stems, espically in the early stages of life. for example... 3.5 weeks old. All Sativa Dominant except the One Indica which has bigger fan leafs also the most purpal veins right up the stem of the small plant. ProMix with added perlite Ph 7, Ph Runoff was 6.5, Water with 2.5ml of Pure BLend Pro Grow per gallon, and superThrive, Ph 6.7-6.8. Water with every watering. Recomended Dose of Nutes on bottle is 7ml per gallon for Rating: 5